Ring and closure for cans

Details Ring and closure for cans Ring and closure for cans

1979-05-21

1981-03-03

Hall, George T.

Receptacles

Closures

Removable closure retained by adhesive or fusion means

220265, 229 43, B65D 4100

Patent

active

042535840

ABSTRACT:
The process of the present invention allows the manufacture of lacquered aluminum or tin-plate rings which have the inner edge thereof bent over outwards so that they are suitable for the closures on cans for foodstuffs. A ring blank made of lacquered sheet is pre-shaped by deep drawing to form the curvature needed for bending over the inner cut edge. The final shaping of the pre-shaped blank into a ring for a can lid takes place, after stamping out the opening, by stretching and bending over the cut edge. When a tear-back membrane is sealed on to the bent-over edge, the ring is suitable as an easyly opened closure for cans for foodstuffs.

REFERENCES:
patent: 3274964 (1966-09-01), Griese, Jr.
patent: 3547305 (1970-12-01), Khoury
patent: 4090004 (1978-05-01), Tebbutt et al.

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